This report describes the data curation service offered within ATMO-ACCESS. The ATMO-ACCESS Homeless Data Portal (https://homeless-data-portal.nilu.no) is the core and entrance to this, and the service is available for all users through this portal. The portal is set up to serve scientists producing atmospheric measurements and time series resulting from research campaigns and TNA activities that are normally not included into any data management and data curation system and activity. Depending on the needs, the portal will route the user requests seamless to the corresponding RI experts. This report describes the data curation service set up in more detail.